Monitoring coherently the Amazon Water Cycle (WC) using satellite observations is crucial for climate and water resources studies. The SAtellite Water Cycle (SAWC) integration methodology is introduced to optimize the satellite datasets. In this paper, the WC budget is balanced simultaneously over 10 sub‐basins by constraining the horizontal water exchanges between them. Compared to an actual assimilation analysis, SAWC benefits from the use of water storage observations from Gravity Recovery and Climate Experiment. SAWC corrects the satellite evapotranspiration datasets that tend to under‐estimate the water‐limited evaporation over the central Amazon and to over‐estimate the energy‐limited evaporation over the northern Amazon. The SAWC precipitation estimates are evaluated against gauge measurements and show good overall results with a correlation varying from 0.94 to 0.99 and root‐mean‐square deviation between 16 and 41 mm/month (≃10% of precipitation estimate).

中文翻译：

---

亚马逊水循环的相干卫星监测。第1部分：方法论和初步评估

使用卫星观测来连贯地监测亚马逊水循环（WC）对于气候和水资源研究至关重要。引入了卫星水循环（SAWC）集成方法来优化卫星数据集。在本文中，通过限制它们之间的水平水交换，在10个子流域中同时平衡了WC预算。与实际的同化分析相比，SAWC受益于重力回收和气候实验中储水观测的使用。SAWC校正了卫星蒸发蒸腾数据集，这些数据往往低估了亚马逊中部地区的水分受限蒸发，而高估了北部亚马逊地区的能量受限蒸发。